World Generation bug, Mob freeze bug, possible corruption

Before I start, I have never experienced a Minecraft crash in my life, the world I'm about to talk about has never once crashed.

I have a Minecraft world which I created prior the 1.18 update, everything updated sweet new 1.18 chunks loaded in really well south of my base co-ordinates, however when I venture north, towards my worlds 0, 0 coordinates, I would walk past a certain X point like +2300 and all of a sudden all surrounding mobs freeze, this would also cause my world generation to grind to a halt, even chunks I had already loaded in wouldn't load back (when I tried to return to my base nothing would load back in), so naturally I try save and quit my world but I would only find that my screen gets stuck on the saving world screen, I then try to force quit my world using the obvious right click, then task manager, then command prompt but to no avail, the only way I can quit Minecraft is through force restarting my computer. I've got no idea how to fix it, I've tried leaving it for a few weeks until the 1.18.1 patch comes out, I updated it, ventured out to try find the end portal and unfortunately crossed that X Axis number. I'm pretty devastated because I put heaps of time into that world, hoping some one has a solution to it, really don't want to spawn in an end portal 😞, thanks in advance.